3 years ago

Which expression is not equivalent to 7(3+5)

1 answer:

4 0

Answer:

Any expression that doesn't equal 56... You didn't really provide any answer choices, so that's the best answer I have for you...

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Let A be the area of a circle with radius r. If dr/dt=3, find dA/dt when r=2.

astraxan [27]

$\bf \textit{area of a circle}=A=\pi r^2
\\\\\\
\cfrac{dA}{dt}=\pi \cdot 2r^1\cdot \cfrac{dr}{dt}\implies \cfrac{dA}{dt}=\pi \cdot 2r\cdot \cfrac{dr}{dt}\quad 
\begin{cases}
r=2\\
\frac{dr}{dt}=3
\end{cases}
\\\\\\
\cfrac{dA}{dt}=\pi \cdot 2(2)(3)$

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3 years ago

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Maine has a cold climate in the winter. Which statement about the probability of temperatures falling below 32°F in Maine during

Marianna [84]

Answer:

the probability is 100

this is the most suitable ans

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2 years ago

You have a coupon for an additional 25% off the price of any sale item at a store. The store has put a watercolor kit on sale fo

telo118 [61]

Final price=original price*(100%- discount 1)(100%-discount 2)
original price=$40
discount 1=25%⇒ 100 - discount 1=100%-25%=75%=75/100=0.75
discount 2=15%⇒ 100 - discount 2=100%-12%=85%=85/100=0.85

original price=$40(0.75)(0.85)=$25.5

Answer: $25.5

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2 years ago

Brian pays £465.98 a year on his car insurance.

denpristay [2]

Answer:

Step-by-step explanation:

We have to reduce 465.98 by 3.6%

Firstly, lets convert the percentage to decimal by dividing by 100. So we have:

3.6/100 = 0.036

Lets find 3.6% of 465.98

That is:

0.036 * 465.98 = 16.77528

This is the "LESSENED" amount. So the final amount would be:

465.98 - 16.77528 = 449.20472

<em>Rounding to 2 decimal places, £ 449.20</em>

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3 years ago

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kifflom [539]

Answer:

For a glider, which a paper airplane is the more lift the glider has the longer it can fly. However, you must keep the weight and drag in check to avoid flight failure.

Step-by-step explanation:

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2 years ago